The stand or fall of servo motor directly affects the stable operation of the cutting machine

Why the customer at the time of ordering cutter should be stressed that must be configured imported servo motor? Because the servo motor is a very important in cutting machine components, its quality directly decides the stability of the equipment used, especially on the problem of deformation contour, plays an important role, so to speak. In addition to the stability of itself, there are many external factors will directly affect the normal operation of the servo motor.

for cutting machine, plate cutting or pipe cutting, want the equipment shall be carried out in accordance with the established graphics processing, the key is to participate in the processing of each axle of dynamic response and cooperate with each other. If in the machining process, the overall response of the shaft is too slow, or certain position in an axis deviation is small, the other a large axial deviation, machining contour deformation problem will appear. And the cause of this deviation is not consistent problem is numerous, have mechanical, external force, servo responsiveness, control system and other factors, or superposition of multiple factors. Therefore, the key to solve these problems lies in the axis has good dynamic response and coordination of cooperation between each other, can make it more strictly carried out in accordance with the stated goal of processing actions. Servo motor as a carry on mechanical and control system in the middle of the actuator, can to some extent compensate for the motion, optimization and coordination system, in order to achieve a more perfect control purposes.





in addition to the stability of the servo motor itself, affect the normal operation of the external factors include:

a, mechanical factor

mechanical problems relatively common, mainly reflected in the design, the transmission way, installation, material, mechanical wear, etc.

2, mechanical resonance

the influence of mechanical resonance problem of servo is unable to continue to improve the responsiveness of the servo motor, so that the overall equipment operation in response to low state. Such problems are common in the machinery with synchronous belt transmission, a long ball screw sometimes also have this kind of situation. Synchronous belt is the main reason of low rigidity, low resonant frequency, long screw's own inertia is larger, and more deformation conditions, especially in the case of small motor capacity selection is relatively easy to start up. Installed at the same time the assembly process of high and low, and the merits of the material will also affect the mechanical resonance.

3, mechanical dithering

machinery jitter essence is the inherent frequency of problem, is usually more appeared in the single ended fixed cantilever beam structure, especially is particularly strong near the deceleration phase. Low frequency jitter in the machined part will present a big wavy shape, relatively high frequency jitter can have serrated form.

4, mechanical stress and external force factors such as

due to differences in mechanical material and installation, equipment such as mechanical stress, the static friction force of the drive shaft may be inconsistent. If equipment involved in two axis trajectory interpolation control such as the static friction force of the internal stress of a shaft or in a larger, will to some extent, consume servo torque, cause the shaft speed is slow, resulting in machining contour deformation. Usually, we can through the feedback servo drives the generated waveform curve to observe the internal stress of the shaft.

the external force acting on the shaft is also more similar. Generally the plate cutting machine, is the contact between the shaft and artifacts, could be affected by external force is limited. But some pipe cutting machine, pipe axis will participate in cutting time interpolation, and another shaft is usually in contact. Tubing at this time due to the influence of the jig, can produce a reverse force of pipe axis, it involved in two axis interpolation control force, cutting effect will surely be affected.

5, nc system factor

in some cases, servo debug the effect is not obvious, this may be involved in the adjustment of the control system. When cutting machine processing usually linear velocity is relatively constant, are all at the same speed in a straight line and curve. It is not much problem in linear motion, but in curve, especially small size circular arc machining deformation may result due to accelerate spend big on the contour.

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